Fritz kiehne



F. KIEHNE.

UNIVERSAL 101m.

APPLICATION FILED JAN.25. I916; RENEWED MAR. 10, l9 l9.

UNITED .srArEs ra rnnr OFFICE.

mm KIEI-INE, or enoss-mcrrrnnrnnnn, JNEIAR BERLIN, GEnivrAnY. nssrenoza '10 TITANIA-WERK, GESELLSCHAF'I MIT BEscHRAn'KrEn HAFTUNG, OEBEBLIN, GER- .MANY, A CORPORATION or GERMANY.

l I UNIVERSAL Jomr.

Specification of Letters Patent -Pateyfied J 1 119 24 1919;

Application filed January 25 1916, Serial No. 74,200; Renewed M rch 10,1919.) Serial Ito-281,794.

To all whom it may 50mm:

Be it known that I, FRITZ Kmnnmengr neer, a subject of the GermanE mperor, and

residing at 69 Lorenzstn, Gross-Lichterfelde, near Berlin, State of Prussia, in the G a E pi e, h ve nv n ed. t in new and useful Improvements in or Relating to Universal Joints, of which the following is a specification.

This invention relates to universal joints of the type in which the parts to be jointed together embrace amember with which they are pivotally connected.

Universal joints of this type are well known in which the pivot pins connectingv the parts with the common member are inserted into the latter from the outside. This construction has the disadvantage that the pivot pins readily become loose when the joint moves, so that the oint falls apart or is impaired. In order to obviate this defect it has been proposed to make the parts embracing the common member in several pieces and tov connect the pivot pins firmly with them. This arrangement, however, resulted in the difliculty of reliably connecting the parts together, and in inconvenience in dismembering the joint.

A primary object of this invention is to provide an improved universal joint of the type described, to which the above mentioned defects are not attached. To this end, I provide that the pivot pins," extend from the in side of the common member outward into the parts of the joint to be connected, and are held in the normal position by a locking member which securely prevents all the pivot pins from moving inward.

The invention consists in the construction, arrangement and combination of parts described hereinafter and pointed out in the claims.

One illustrative embodiment of the invention is represented by way of example in the accompanying drawing wherein Figure 1 is a longitudinal section taken through an improved universal joint, and

Fig. 2 is a cross-section taken on the line 2---2 in Fig. 1, and Fig. 3 shows a modified f 5 The lpi vot p ins a e :carried the com- I mon member 0 and have reduced portions extending intoaholes in; the parts a, and-b. The four pivot pins are placed into their operative position in the following manner: After they have been inserted into the member e the forks are placed into position embracing this member and then the pins are pushed from the inside outward, whereupon their reduced portions extend into the holes in the forks and are prevented from moving farther outward. For pushing the pins outward a screw is used which is inserted into the member 0. This screw has a cylindrical middle portion and is pointed at its end, so that when it is screwed into the member a the four pins d are forced uniformly outthe screws are, however, accessible from the outside when the parts a and b are placed at an angle of about 120 one with the other.

The essence of the invention consists in the pivot pinsbeing driven outward from the common member into the forks. Any

suitable means may be used for forcing the pins outward; for example, instead of the screw a cam may be used or a member 9 (Fig. 3) having a wedge action.

I claim 1. In a'universal joint of the character de-' scribed, the combination of a coupling member having flattened faces with a plurality of forked parts to be articularly connected and embracing said member, the forks of said parts having a hole in each prong, pivot pins extending outwardly into said holes, a means for forcing the pinsoutwardly and preventing them from being moved inwardly, substantially as described.

2. In a universal joint the combination of a member, a plurality of forked parts hav-- a and b in the middle of the parts a and 6;

Comes of this patent maybe obtaineil Ward into holes in thetines of said parts and means for commonly and s multaneously movingsald plns outward into said 110 andlockiii'g them in "their out-es po'sit'ion 3. In a universal joint the combination of a member, a plurality of forked parts to be articularly connected embracing the menu ber, pivot pins mounted in said member allentendi ng outwi id villio; holes in the. tines v of said parts anda screw having a cylindrical lni'ddle'portion and being'po'inted at its ng s a d opins outward into sa dholes and locking them 111 their outer POSllZlQ 4. In a universal joint thecomloiiiation of a" ei'efiib riieijnliil' liw e f f rked-finish b articularly connected embracing the me1nbe pivot pins mounted 111 sa d member all extending outward into holes in the tlnes of m' five cents each, by addressing the commissioner og- Patents; 

